[fiction] A parallel universe is a hypothetical self-contained separate reality coexisting with one`s own. A specific group of parallel universes is called a `multiverse`, although this term can also be used to describe the possible parallel universes that constitute reality. While the terms `parallel universe` and `alternative reality` are...
Found on
http://en.wikipedia.org/wiki/Parallel_universe_(fiction)

Uhura meets the parallel-universe Sulu in Mirror, Mirror A hypothetical universe, entirely separate in space and time from our own. Such universes, the existence of which is predicted by the many-worlds interpretation of quantum mechanics and also by chaotic inflationary theory, could conform to...
Found on
http://www.daviddarling.info/encyclopedia/P/parallel_universe.html
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